🥳 Third party tools do DCT flush! 🥳
Thread Starter
Pro
Joined: Mar 2021
Posts: 627
Likes: 417
From: Virginia, Lynchburg-adjacent
🥳 Third party tools do DCT flush! 🥳
i just updated mine tonight and there's the magic button!
Link to this tool on amazon:
I made a PDF of the whole flush and filter process (info collected by Andybump) a few days ago:
https://www.corvetteforum.com/forums...post1607123910
Other launch tools also got the update:
Latest Launch Software Update
Last edited by 22c8z51; Oct 22, 2023 at 12:44 PM.
Popular Reply
Oct 22, 2023, 09:05 AM
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Thread Starter
Pro
Joined: Mar 2021
Posts: 627
Likes: 417
From: Virginia, Lynchburg-adjacent
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Thanks for the heads-up.
Race Director
Joined: Aug 2019
Posts: 12,351
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From: Central Illinois
Thank you for posting this. I have had the dealer change mine twice now (free one and one I bought) and neither time did the tech do the flush. He says he doesn't do it since driving the car runs the fluid through the filter. In my mind, if it didn't accomplish anything, why would it exist? I will be buying one of these tools. How easy it it to upgrade the software?
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That tool looks amazing! Definitely something to look into more because it seems like it does a LOT.
Thanks for posting it.
Thanks for posting it.
Racer
Joined: Nov 1999
Posts: 294
Likes: 69
From: Yorktown Heights New York
Awesome find! Will buy one for sure as I’m always one to do my own maintenance mainly for 2 reasons. Save $ and I enjoy doing it. Also in my area I’m not sure how much I trust the dealers around me.
BUT….i thought in order for your warranty to continue you do have to bring it in to a certified dealer and have records of these procedures being done. Hence if your car does have an issue, GM will honor warranty. Is that to be true?
also, I thought these devices have to do the flush in some sort of sequence. Still waiting for that info to be public and I’ll wait and see if someone actually does it on a 20k tranny and what the effects afterwords are. Again I’m still buying it ( mainly for error codes and clearing) and doing my free change for sure but I’m hoping for future after that I can do myself but just nervous if something goes wrong and they check records it’s your words against their proof.
thoughts?
BUT….i thought in order for your warranty to continue you do have to bring it in to a certified dealer and have records of these procedures being done. Hence if your car does have an issue, GM will honor warranty. Is that to be true?
also, I thought these devices have to do the flush in some sort of sequence. Still waiting for that info to be public and I’ll wait and see if someone actually does it on a 20k tranny and what the effects afterwords are. Again I’m still buying it ( mainly for error codes and clearing) and doing my free change for sure but I’m hoping for future after that I can do myself but just nervous if something goes wrong and they check records it’s your words against their proof.
thoughts?
Race Director
Joined: Aug 2019
Posts: 12,351
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From: Central Illinois
Awesome find! Will buy one for sure as I’m always one to do my own maintenance mainly for 2 reasons. Save $ and I enjoy doing it. Also in my area I’m not sure how much I trust the dealers around me.
BUT….i thought in order for your warranty to continue you do have to bring it in to a certified dealer and have records of these procedures being done. Hence if your car does have an issue, GM will honor warranty. Is that to be true?
also, I thought these devices have to do the flush in some sort of sequence. Still waiting for that info to be public and I’ll wait and see if someone actually does it on a 20k tranny and what the effects afterwords are. Again I’m still buying it ( mainly for error codes and clearing) and doing my free change for sure but I’m hoping for future after that I can do myself but just nervous if something goes wrong and they check records it’s your words against their proof.
thoughts?
BUT….i thought in order for your warranty to continue you do have to bring it in to a certified dealer and have records of these procedures being done. Hence if your car does have an issue, GM will honor warranty. Is that to be true?
also, I thought these devices have to do the flush in some sort of sequence. Still waiting for that info to be public and I’ll wait and see if someone actually does it on a 20k tranny and what the effects afterwords are. Again I’m still buying it ( mainly for error codes and clearing) and doing my free change for sure but I’m hoping for future after that I can do myself but just nervous if something goes wrong and they check records it’s your words against their proof.
thoughts?
Instructor
Joined: Sep 2022
Posts: 195
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From: Maryland
There are lots of C8 maintenance Guru's on this forum. When it comes to DCT issues of any kind, I trust the opinions of Kracka, Andybump, RKCRLR, JerryU, and many more C8 Guru's that I failed to mention.
When you read through threads and answers, you can tell which guys perform experimental maintenance from the ones who really know their ****.
When you read through threads and answers, you can tell which guys perform experimental maintenance from the ones who really know their ****.
Last edited by joecbrzx; Oct 22, 2023 at 09:20 AM.
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Race Director
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From: Fulshear, TX
Thank you for posting this. I have had the dealer change mine twice now (free one and one I bought) and neither time did the tech do the flush. He says he doesn't do it since driving the car runs the fluid through the filter. In my mind, if it didn't accomplish anything, why would it exist? I will be buying one of these tools. How easy it it to upgrade the software?
Pro
Joined: Jul 2023
Posts: 607
Likes: 559
Just keep the receipts of the transmission fluid you purchased, log the date you changed it, and maybe take a picture/screenshot of the scan tool performing the flush procedure. That's all you need.
Safety Car
Joined: Nov 2012
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From: Gettysburg PA
2020 C8 of the Year Finalist - Unmodified
For those who have bought one, PLEASE post your findings from using it.
Is it user friendly? Do I need to have an advanced Computer Science Degree to operate it?
Race Director
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This is from something someone else posted. I cannot find that original post. I really recommend that anyone doing this should actually get an official copy of the Service Manual as recommended in the Owner's Manual.
This is a bit confusing since its says a condition for running the procedure is engine running. But then a later step says ignition in service mode. Once the HSF is initiated, it says follow instructions on the Scan Tool. I wonder if the aftermarket tool will have the instructions. Will it tell you to start the engine if it is in service mode?
Conditions for Running the Procedure:
Brake Pedal = Applied
Engine = Running
Transmission Fluid Temperature Sensor = Warmer than 50°C (122°F)
Transmission Range = P> or N>
Ignition >> On / Vehicle >> In Service Mode (confusing, since it says engine running, just above under conditions for running the procedure)
Select: Module Diagnostics
Select: K71 Transmission Control Module
Select: Configuration/Reset Functions
Select: Hydraulic System Flush Procedure
Follow the instructions on the scan tool. The procedure will complete within 8> min
This is a bit confusing since its says a condition for running the procedure is engine running. But then a later step says ignition in service mode. Once the HSF is initiated, it says follow instructions on the Scan Tool. I wonder if the aftermarket tool will have the instructions. Will it tell you to start the engine if it is in service mode?
Conditions for Running the Procedure:
Brake Pedal = Applied
Engine = Running
Transmission Fluid Temperature Sensor = Warmer than 50°C (122°F)
Transmission Range = P> or N>
Ignition >> On / Vehicle >> In Service Mode (confusing, since it says engine running, just above under conditions for running the procedure)
Select: Module Diagnostics
Select: K71 Transmission Control Module
Select: Configuration/Reset Functions
Select: Hydraulic System Flush Procedure
Follow the instructions on the scan tool. The procedure will complete within 8> min
Race Director
Joined: Aug 2016
Posts: 12,763
Likes: 10,199
From: Garden Valley CA
Awesome find! Will buy one for sure as I’m always one to do my own maintenance mainly for 2 reasons. Save $ and I enjoy doing it. Also in my area I’m not sure how much I trust the dealers around me.
BUT….i thought in order for your warranty to continue you do have to bring it in to a certified dealer and have records of these procedures being done. Hence if your car does have an issue, GM will honor warranty. Is that to be true?
also, I thought these devices have to do the flush in some sort of sequence. Still waiting for that info to be public and I’ll wait and see if someone actually does it on a 20k tranny and what the effects afterwords are. Again I’m still buying it ( mainly for error codes and clearing) and doing my free change for sure but I’m hoping for future after that I can do myself but just nervous if something goes wrong and they check records it’s your words against their proof.
thoughts?
BUT….i thought in order for your warranty to continue you do have to bring it in to a certified dealer and have records of these procedures being done. Hence if your car does have an issue, GM will honor warranty. Is that to be true?
also, I thought these devices have to do the flush in some sort of sequence. Still waiting for that info to be public and I’ll wait and see if someone actually does it on a 20k tranny and what the effects afterwords are. Again I’m still buying it ( mainly for error codes and clearing) and doing my free change for sure but I’m hoping for future after that I can do myself but just nervous if something goes wrong and they check records it’s your words against their proof.
thoughts?
One concern I would have is if the tool actually does the HSF correctly. These aftermarket companies usually have to reverse engineer procedures like this and there is no easy way to determine if it is the same procedure that the GM tool does. If GM finds out it doesn't do the procedure correctly then that could be a reason to deny warranty coverage. But I think that is unlikely.